Practice Exercise: Building Envelope Systems

Starting Point

  • R38 Roof
  • 12/5 operating schedule
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Building Envelope-Related Design

  • Building Orientation = 90

South

  • WWR - southern walls = 15-50
  • Window Shade South = 1/6-1/4 Win Height
  • Window Glass South = Sgl Clr; Dbl Clr; Dbl LoE

North

  • WWR - Northern walls = 30-0
  • Window Shade North = same
  • Window Glass North = Top LoE

West

  • WWR - Western walls = 50-0
  • Window Shade West = same
  • Window Glass West = same

East

  • WWR - Eastern walls = 0-40
  • Window Shade East = same
  • Window Glass East = Dbl LoE

Wall Construction

  • R38

Infiltration

  • 0.17 ACH
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^51.4

Power and Lighting measures

Lighting Efficiency

  • 0.3 W/sf

Daylighting & Occupancy Controls

  • Daylighting & Occupancy Controls

Plug Load Efficiency

  • 0.6W/sf

HVAC

  • High efficiency heat pump
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Photovoltaic Panels

Pannel Efficiency

  • 20.4%

Payback Limit

  • 20 yr

Surface coverage

  • 75%
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